*{margin:0;padding:0}
ul,li,ol{list-style: none;}
a{text-decoration: none;}
img{width:100%;height:100%;display: block;}
body,html{width:100%;height:100%}
input{ background :none; outline :none; border :none; }
a{text-decoration: none;color:gray}
i{font-style:normal;}
button{background :none; outline :none; border :none;}
.top{
    width:1200px;
    height:130px;
    margin:0 auto
}
.center{
    width:100%
}